Last updated: 16/10/2022

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Welcome to another article. This time we will talk about a tool that has allowed us to provide water to flats and homes with the necessary pressure so that we can enjoy it comfortably. We are talking about submersible pumps, equipment that provides pressure to the liquid.

A submersible pump is a mechanism that houses a hermetically sealed motor and, as its name suggests, they are used to pump liquids in which they are submerged. Simply put, submersible pumps push whatever liquid it is submerged in to the surface.

We want to help you find the best submersible pump to suit your job and budget. That’s why we’ll show you the different types of pumps that exist along with the main features and benefits they possess for extracting the liquid you want.


  • Submersible pumps are devices that have a hermetically sealed motor so that they can be submerged over any liquid and pushed to the surface. These pumps are mainly used to deliver pressurised water to houses and flats from water tanks.
  • We can find a wide variety of submersible pumps according to the type of function they have. We can see that there are submersible sump pumps, sewage pumps, effluent pumps, and Grindder and Shedder pumps.
  • Knowing the quality of the water to be pumped, the depth of immersion, the pressure and the evacuation height are the aspects that will help us to choose the best submersible pump according to the type of place where we are going to install it in order to extract the liquids we want.

The Best Submersible Pump: Our Picks

Buying guide: What you need to know about submersible pumps

Submersible pumps are equipment that have helped the expansion of cities by enabling us to transport liquids to places that were previously difficult to access. Here you can see the different types of pumps (sump, effluent, sewage, Grindder and Shedder) as well as the cost they can have.

Submersible pumps have enabled cities to expand by allowing large quantities of water to be transported quickly. (Photo: Weerapong Khodsom/

What is a submersible pump and what are its advantages?

Submersible pumps are hermetically sealed motors that are attached to the pump body. They allow liquids to be pumped to the surface at a suitable pressure so as not to damage piping systems.

The main advantage of submersible pumps is that they are very efficient because they use less energy to move water outwards. That is why these pumps are widely used in water tanks to supply water to flats and houses with the right pressure to perform various tasks with water.

  • They are compact
  • They consume less electrical energy
  • They have filters to prevent impurities from passing through
  • They do not depend on external water pressure
  • They can be submerged in water
  • They are expensive
  • They require maintenance
  • They can be affected by electrical overloads
  • They can be heavy

Submersible sump pumps, effluent pumps, sewage pumps, Grindder pumps or Shedder pumps – what should you pay attention to?

There are a variety of submersible pump models on the market today, each offering a particular function to extract liquids from various locations. Specifically, there are 4 types of submersible pumps and they are classified as: sump, effluent, sewage, Grindder and Shedder.

Submersible Sump Pump. This model of submersible pump is used for cleaning turbid water that may be present in high flow rates. The speeds of this type of submersible pump range from 0.15 to 100 horsepower. They have a variety of uses: from household to mining.

Submersible Effluent Pump. Effluent pumps can handle solids up to ¾ mm in diameter. They can reach speeds of ¼ to 2 horsepower and are used in septic tank runoff. They have a small footprint which makes them easy to handle and move.

Submersible Sewage Pump. As the name suggests, they are designed to handle raw sewage. They can handle solids from 1 ½ to 3 mm in diameter and can be rated from ½ to 100 horsepower.

Submersible Grindder Pump. Designed to handle low flow rates, this model of submersible pump can handle any type of material in the liquid, including soft solids as it employs a grinder system. Reaches speeds of up to 100 horsepower.

Shedder Submersible Pump. Similar to Grindder submersible pumps, Shedder pumps can handle high flow rates of liquids. They can handle the same type of solids, as they have the same waste shredding system.

Submersible Sump Pumps Submersible Effluent Pumps Submersible Sewage Pumps Submersible Grindder Pumps Submersible Shedder Pumps
Use Turbid water cleaning Septic tank dewatering Raw sewage treatment Removal of various types of solids Removal of various types of solids
Speed 0.15 to 100 horsepower ½ to 2 horsepower ½ to 100 horsepower Up to 100 horsepower Up to 100 horsepower
Water Flow High Flow Low Flow High and Low Flow Low Flow High Flow
Size Medium Small Small Large Small
Solids Handling Small Solids Solids ¾ cm diameter Solids 1 ½ to 3 cm diameter Any Solids Any Solids

Purchasing Criteria

The use of submersible pumps has allowed us to bring water at a pressure and speed to places where the precious liquid is scarce. This has helped to improve people’s quality of life considerably. But before you go out and buy one, you should be aware of certain factors that will make your purchase safer.

Each of these factors will be developed in more depth so that you have a more precise and concise way what to look for when you want to buy a good submersible pump for your home.

Water quality

This is one of the factors to take into account when buying a submersible pump. It doesn’t matter whether it is a manufactured reservoir or an underground well or lagoon. Places where liquids are deposited can be home to a large number of bacteria and infections due to dirt.

To avoid consuming contaminated water, it is important that our pump has a filter that is capable of trapping as many contaminants as possible. To do this, we must verify that our pump has filters with a classification of impurities ≤ 5 mm, as this is classified as clean water.

The immersion depth

The immersion depth of a submersible pump is the maximum capacity of the equipment to be submerged in water. This factor will depend on how deep the well or water tank is where we want to install a pump.

Care must be taken to buy the correct submersible pump as a pump that does not have the necessary immersion capacity will not work properly causing the motor to burn out and we will have to pay for new equipment.

Depending on the use and type of pump, the depth of immersion may vary.

Submersible pumps for shallow wells. This type of pump is used to extract water from wells with a maximum depth of 8 metres or less. It is common to see them in situations such as extracting water from a cellar or shed.

Submersible intermediate well pumps. These are pumps that can work in wells or water tanks with a depth of between 8 metres and 35 metres. They are mostly used in small installations.

Deep well submersible pumps. As the name suggests, these pumps are capable of working at great distances from the surface. Specifically, they can operate from 35 metres to a depth of 120 metres.

Depending on the space of the well or tank, there may be more than one submersible pump working to transport liquids. (Photo: Hilda Weges /

Pumps for houses or buildings

Another factor to consider is where the submersible pump for water extraction will be installed. Depending on whether it is a house or a building (either residential or office) will determine the submersible pump to be installed.

For residential complexes. In case the submersible pump goes to a water tank for a building it is recommended to use a submersible pump for deep wells, as the liquid receptacle is likely to be too large and deep to supply water with the necessary speed and power to each flat.

For houses. A house is smaller than a building and there is only one tenant or household that needs the water. In this type of case an intermediate submersible well pump is more than sufficient to be able to supply water to all the pipes on site with the necessary pressure and speed.


Another point to take into account when purchasing a submersible pump is the pressure with which it transports the liquid through the pipes. This factor will depend on the type of motor we have, since the higher the speed, the higher the pressure of the liquid. It is also important to know the number of pipes through which the liquid will travel.

Flats. In this type of installation where there are a large number of pipes, it is recommended that the motors have around 100 horsepower in order to be able to supply the liquid to the highest levels at a good level.

Houses. For a house, submersible pumps with a motor of 2 to 10 horsepower can be used depending on the area to be covered. This is because the house may only have two levels and the number of pipes will be better than in a residential complex with several flats.

Evacuation height

This refers to the height (in metres) between the submerged pump and the point where it starts discharging into the piping system. Simply put, it is the gallons per minute displaced from the tank to a tap. This factor will depend on the motor you have. The higher the speed, the more gallons it will move.

To know the correct lift height you need to do some mathematical calculations and pay attention to how deep your tank is and the distance between the pump and the plumbing system.

(Featured image source: Dmitrii Balabanov /